Without knowing details, that would be orders of magnitude more than I ever heard from any node operator but if they have captured some niche users where they can charge that much with fast turnover for example, good for them.
Discussion
At least a big part of their sources are CashApp users. The node is positioned in such a way that any payment from those users have to go out via the c= node. On the way back I'm not sure if they catch all the traffic but all outbound from CashApp goes via c=.
Kinda feels like a shadow fee for CashApp users since they both fall under Block.